ABC is a triangle with AB=BC=AC=3 cm. D and E are two different points such that AD=AE=4 cm, BD=BE=5 cm and CD=CE=6 cm. Determine the length of DE. Answers please send to alexey.kuzmenko@unige.ch.

ABC is a triangle with AB=BC=AC=3 cm. D and E are two different points such that AD=AE=4 cm, BD=BE=5 cm and CD=CE=6 cm. Determine the length of DE. Answers please send to alexey.kuzmenko@unige.ch.